Naoya Mukai is having the time of his life after his childhood friend Saki Saki finally accepts one of his countless confessions. Ensuring that their relationship will stay strong, he spares no effort in showering affection to his now beloved girlfriend. However, one afternoon, another girl named Nagisa Minase suddenly confesses to Naoya following months of preparation. Even though he politely rejects her, Nagisa's irresistible charm and determination continue to attract Naoya. Wanting to fulfill both Saki and Nagisa's desires, Naoya ends up proposing a crazy idea—to date the two of them simultaneously, with both girls fully aware. This unprecedented state of affairs ultimately causes wacky and hilarious situations in whatever they do to keep their unusual relationship going.

When, after her sudden death, Rinko Hanasaki is reborn as Raeliana McMillan, she is not sure whether to curse her luck. Raeliana was a minor character in a novel Rinko read, and as the eldest daughter of a nouveau-riche baron, she led a carefree life until her unfortunate demise at the hands of her fiancé, Lord Francis Brooks. To avoid her destined fate, Raeliana is determined to end her engagement with Francis. However, when Francis refuses to break things off, Raeliana decides to seek help from someone of higher standing and approaches Duke Noah Wynknight—the novel's male protagonist. Using her knowledge of the plot, Raeliana captures the duke's interest by proposing a deal: she will not expose his secrets if Noah agrees to act as her fiancé. Little does she know that getting involved with a duke who only shows his true colors around her may lead to more than she bargained for.

As a young child, Aizawa Yuuichi had often visited his cousin in the city; however, something drastic happened to keep him away for seven long years. Now, Yuuichi returns, his memories of those days are simply gone. Settling into the wintry town, Yuuichi comes across several young girls, all of whom are connected to his past. As he befriends them and continues to interact with them, the long forgotten memories from his childhood begin to resurface...

It’s been 7 years since Yuuichi Aizawa visited his aunt Akiko, but now that his parents have gone to Africa to pursue their careers, he is finally back in the little northern town. Yuuichi is not really overjoyed with the prospect of living here though, because all of his memories of this place and the people living in it have mysteriously vanished. His cute cousin Nayuki seems like a stranger as well, even though he used to play with her all the time when they were younger. On the day of moving into his new home, Yuuichi starts unpacking the boxes and stumbles upon a red headband that no one seems to recognize. This is one of the first clues that will make Yuuichi take a stroll through the snow-covered town and make him start recalling fragments of his past, broken promises and buried secrets. Yuuichi soon realizes that there is something supernatural going on, and all of his new female acquaintances seem to have links to his forgotten past.